Improvement in attaching knobs to their spindles



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e lnite @tibia W. T. MUNGER, OF BRANFORD, ASSIGNOR TO P. ANC F. CORBIN,

1 -OF BRITAIN, CONNECTICUT.

Letters Potent No. 86,998, dated February 16, 1869.

IMPROVEMENT nv ATTACHING KNoEs *ro THEIR sPINDLEs.

i The Schedule referred to in these Letters Patent and making part ofthe same.

-and useful Improvement in Connectingr Knobs to the Spindles of Locksand I'do hereby declare the following to be a full, clear, and exactdescription of the said invention, reference being had to theannexedfdrawing, making part of thisl specification, wherein- Figure Iis a side view ofthe spindle, knob, and nut, the rose and door beingshown partially insection.

Figure 2 is a section at the line xx, transversely, of the spindle.

Similar marks of reference denote the same parts.

The object of this invention is to do away with the pins and screws thathave heretofore been employed to hold the knob upon the spindle, and tomake vthe connection by a nut and coupling that is behind and Within therose or plate that is screwed upon the door.

My invention consists in a coupling-nut, screwed upon the angles of thespindle, combined with a coupling upon the shank of the knob, thecoupling of the nut heilig partially revolved to lock into the couplingro f the shank after the knob is in place, and then the nut is preventedfrom turning and uncoupling the parts, by a key, or its equivalent,introduced beneath or within the rose.

In the drawingv a represents the spindle of 'any lock or latch.

Upon the'angles a screwthread is formed that receives the nut b. v

This nut can be screwed upon thespndle to any `point that may berequired bythe thickness of the door, and its shoulder takes against thesurface of the plate c, that is screwed. upon the door,4

Ilie nut bis v'formed with coupling-hooks, 2' 2, ex-

" tending out from the face ofthe nut, and the shank d of the knob eisformed with a neck at 3.

The sides of the fiange 4, at the end of the shank (1,'are removed, sothat when the knob is slipped upon the polygonal spindle, the parts 2and 4 pass each other, and, then, by giving the nut b aquarter'rotation, the couplings lock togethenthe hooks 2 turning intothe neck 3, and thereby rmly holding the knob, so that it cannot bepulled ofi'. p

In order, however, to prevent the'V nut b being turned by the action ofthe knob, I introduce a key, i, that is formed-,as a fork, that passesin between the face of the nut b and the end .of the shank'd, and fillsthe space between the lflat sides of the spindle and the projectingcoupling-hooks 2 2, so that said nut cannot turn upon the spindle. y

It is to be understood that the rose k is to be slipped over the shankof the knob, before that is pnt upon the spindle, and after the partsare coupled together, therose is screwed to the face of the door, andcovers up the coupling, and also prevents the key 'i falling out, shouldit work loose. i

What I claim, and desire to secure by Letters Patent, is`

The nut b, formed with the coupling-hooks 2, in combination withthe neck3, flange 4, and key i, constructed and applied substantially in theInannerset forth.

In witness whereof, I have hereunto set my signature, this 5th day ofNovember, A. D. 1868.

W. T. MUNGER. Witnesses:

CHAs. PECK,

Enwn L. PRIOR.

